The other night I played a low buy-in single table tournament on PokerStars. I got down to the final two and despite finding myself on the wrong side of a couple of coolers when I had him covered, it was pretty much the easiest finish to a tournament that I ever had. My opponent was fairly predictable in general and fell into patterns of behaviour.
The worst thing that he did was to give me the advantage on nearly every single hand. Because it was heads up, the small blind was also the button, being in position after the flop. We both chose to play around the same amount of hands from the small blind, and therefore we were folding around the same as each other. The difference was that when he did play from small blind he would always call rather than raise giving me the option to check and see the flop. When I was in the small blind I would always put in a minimum raise rather than call.
The result of this pattern is that when I was out of position post flop, we were playing for the minimum possible. When I was in position, the pot had been nearly doubled. This gave me a huge advantage and I found myself quickly adding to my stack without really having to do too much. The maths just worked for me.